Heat recovery system employing a temperature controlled variable speed fan
A heat recovery system is described for use in recovering heat from an industrial process producing a heated fluid comprising: a source of inlet air; a housing coupled to the source and including a heat exchanger; means for passing the heated fluid through the heat exchanger; the housing including means for moving a variable volume of air adjustable over a continuous range from the source through the heat exchanger; air discharge means communicating with the housing for discharging air which has passed through the heat exchanger; a control system including first temperature sensing means for sensing the discharge temperature of the discharge air moving through the discharge means and a control circuit coupled to the first temperature sensing means and to the moving means for varying the volume of air moved in response to the sensed discharge temperature to control the temperature of discharge air passing through the discharge means at a first predetermined value; and the control system including second temperature sensing means for sensing the temperature of the source of inlet air and valve means coupled to and controlled by the control circuit to cause liquid to bypass the heat exchanger when the inlet air temperature rises above a second predetermined value.
- Assignee:
- Plant Specialties Co., Grand Rapids, MI
- Patent Number(s):
- US 4589475
- OSTI ID:
- 5502560
- Resource Relation:
- Patent File Date: Filed date 2 May 1983
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BLOWERS
HEAT RECOVERY
INDUSTRIAL PLANTS
HEAT RECOVERY EQUIPMENT
WASTE HEAT UTILIZATION
AIR FLOW
CONTROL SYSTEMS
ELECTRONIC CIRCUITS
HEAT EXCHANGERS
SPEED REGULATORS
TEMPERATURE CONTROL
TEMPERATURE MEASUREMENT
VALVES
CONTROL
CONTROL EQUIPMENT
ENERGY RECOVERY
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
GAS FLOW
RECOVERY
WASTE PRODUCT UTILIZATION
320304* - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Waste Heat Recovery & Utilization
320303 - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Equipment & Processes